Add staff permission controls for editing staff and customers

- Add can_edit_staff and can_edit_customers dangerous permissions
- Move Site Builder, Services, Locations, Time Blocks, Payments to Settings permissions
- Link Edit Others' Schedules and Edit Own Schedule permissions
- Add permission checks to StaffViewSet (partial_update, toggle_active, verify_email)
- Add permission checks to CustomerViewSet (update, partial_update, verify_email)
- Fix CustomerViewSet permission key mismatch (can_access_customers)
- Hide Edit/Verify buttons on Staff and Customers pages without permission
- Make dangerous permissions section more visually distinct (darker red)
- Fix StaffDashboard links to use correct paths (/dashboard/my-schedule)
- Disable settings sub-permissions when Access Settings is unchecked

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/pages/help/__tests__/HelpAutomations.test.tsx

@@ -0,0 +1,34 @@
+import { describe, it, expect, vi } from 'vitest';
+import { render, screen } from '@testing-library/react';
+import React from 'react';
+import { MemoryRouter } from 'react-router-dom';
+import HelpAutomations from '../HelpAutomations';
+
+vi.mock('react-i18next', () => ({
+  useTranslation: () => ({
+    t: (key: string, fallback?: string) => fallback || key,
+  }),
+}));
+
+const renderWithRouter = (component: React.ReactElement) => {
+  return render(
+    React.createElement(MemoryRouter, {}, component)
+  );
+};
+
+describe('HelpAutomations', () => {
+  it('renders the page title', () => {
+    renderWithRouter(React.createElement(HelpAutomations));
+    expect(screen.getByText('Automations Guide')).toBeInTheDocument();
+  });
+
+  it('renders back button', () => {
+    renderWithRouter(React.createElement(HelpAutomations));
+    expect(screen.getByText('Back')).toBeInTheDocument();
+  });
+
+  it('renders overview section', () => {
+    renderWithRouter(React.createElement(HelpAutomations));
+    expect(screen.getByText('Overview')).toBeInTheDocument();
+  });
+});